Section 4 Pachymeter Operation and Clinical Use
2. Within the Patient Screen, enter information
for a new patient by touching the
[ NEW PAT ] button or edit the existing
patient information by touching the [ EDIT ]
button.
3. Enter the patient name by touching the
appropriate alphanumeric keys. When
finished entering the name, touch the
[ ENTER ] button.
4. Enter the patient ID number, and touch the
[ ENTER ] button when finished.
5. Enter the eye to be examined by touching
the [ OD / OS ] button to toggle between the
left and right. When the correct eye has been
selected, touch the [ ENTER ] button.
6. Touch the [ DONE ] button when finished
entering the patient information.
MEASUREMENT BIAS
The measurement bias is preset to 100%. The
user should select the appropriate value for
measurement bias based on the surgical
technique and/or surgical apparatus to be used
for the particular procedure. The value can be
changed as follows:
1. Touch the [ MEASURE ] button if not
already in the Measurement Screen.
2. In the Measurement Screen, touch the
[ BIAS ] button.
3. Touch the [ BIAS ] button again to proceed
to the Bias Edit Screen.
4. Touch the [ BIAS ] button and enter the
desired bias by touching the appropriate
alphanumeric keys. When finished entering
the bias, touch the [ ENTER ] button.
5. Verify that the bias has been updated to the
desired value.
CORNEAL VELOCITY
The corneal velocity is preset to 1636 m/s. The
corneal velocity does not usually require
changing, and is provided merely for the user’s
convenience (for example, changing the corneal
velocity may allow for comparison of corneal
thickness measures between the P
ACSCAN™ and
other instruments). The value can be changed as
follows:
1. In the Measurement Screen, touch the
[ CVEL ] button.
2. Touch the [ CVEL ] button again to proceed
to the Corneal Velocity Edit Screen.
3. Touch the [ CVEL ] button and enter the
desired corneal velocity by touching the
appropriate alphanumeric keys. When
finished entering the corneal velocity, touch
the [ ENTER ] button.
4. Verify that the corneal velocity has been
updated to the desired value.
4.4
PATIENT PREPARATION
Apply a drop of topical anesthetic to the eye that
is to be measured prior to performing the corneal
measurements.
The patient should be either seated or placed in a
supine position. Providing a fixed target for the
patient to view may assist in alignment of the
probe.
4.5
PATIENT EXAMINATION
Following entry of user and patient information,
corneal thickness measurements may be
obtained. Select the [ MEASURE ] button from
any screen to display the Measure Screen.
Doc # 0300-A-1901-3D 4 - 3
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